python: Add manifest build #8
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The application code is the result of o4-mini-high converting the Rust implementation, with some additional modifications to tidy it up. The `pyproject.toml` is the result of running `poetry init`.
So that a binstub is rendered for `quotes-app-python` in the venv.
So that the Flox auto-setup hook indetifies the project as Poetry, otherwise we only get Python installed.
This uses the auto-setup hook, which has identified incompat with build in the past. The build stanza will be added in a separate commit.
Re-generated with `nix run github:flox/flox -- init` to pick up changes that are currently only on `main`.
This took a while to figure out because "building" a Python application
normally means distributing for it installation with a tool like `pip`
but it doesn't necessarily produce a standalone artifact that can be run
as a "binary" command, in the same way that `bundler` can produce
binstubs for Ruby applications.
Poetry is instructed to install into a new virtualenv within `$out`:
% l result-quotes-app-python/quotes-app-python-Xe7YT7dH-py3.12
total 12K
-r--r--r-- 1 root wheel 40 Jan 1 1970 .gitignore
-r--r--r-- 1 root wheel 194 Jan 1 1970 CACHEDIR.TAG
dr-xr-xr-x 14 root wheel 448 Jan 1 1970 bin
dr-xr-xr-x 3 root wheel 96 Jan 1 1970 lib
-r--r--r-- 1 root wheel 465 Jan 1 1970 pyvenv.cfg
I can't control the nesting though so we have to symlink the binary:
% l result-quotes-app-python/bin/quotes-app-python
lrwxr-xr-x 1 root wheel 58 Jan 1 1970 result-quotes-app-python/bin/quotes-app-python -> ../quotes-app-python-Xe7YT7dH-py3.12/bin/quotes-app-python
That binstub references the virtualenv:
% cat result-quotes-app-python/bin/quotes-app-python
#!/nix/store/bw0gjnj5d2fplfrci7m1sp2z9si8xkll-quotes-app-python-0.0.1/quotes-app-python-Xe7YT7dH-py3.12/bin/python
import sys
from quotes_app_python.main import main
if __name__ == '__main__':
sys.exit(main())
The resulting build can be run without being in an existing activation:
% ./result-quotes-app-python/bin/quotes-app-python
INFO:quotes-app-python:Loaded 10 quotes
INFO:quotes-app-python:Starting server on http://0.0.0.0:3000
INFO: Started server process [24865]
INFO: Waiting for application startup.
INFO: Application startup complete.
INFO: Uvicorn running on http://0.0.0.0:3000 (Press CTRL+C to quit)
The resulting closure looks like this:
% nix run nixpkgs#nix-tree -- --dot ./result-quotes-app-python
strict digraph {
"sqlite-3.48.0" -> "zlib-1.3.1" [];
"quotes-app-python-0.0.1" -> "python3-3.12.10" [];
"readline-8.2p13" -> "ncurses-6.5" [];
"python3-3.12.10" -> "ncurses-6.5" [];
"python3-3.12.10" -> "mpdecimal-4.0.0" [];
"python3-3.12.10" -> "sqlite-3.48.0" [];
"python3-3.12.10" -> "xz-5.8.1" [];
"python3-3.12.10" -> "bash-5.2p37" [];
"python3-3.12.10" -> "libffi-39" [];
"python3-3.12.10" -> "gdbm-1.25-lib" [];
"python3-3.12.10" -> "tzdata-2025b" [];
"python3-3.12.10" -> "readline-8.2p13" [];
"python3-3.12.10" -> "bzip2-1.0.8" [];
"python3-3.12.10" -> "expat-2.7.1" [];
"python3-3.12.10" -> "zlib-1.3.1" [];
"python3-3.12.10" -> "mailcap-2.1.54" [];
"python3-3.12.10" -> "libxcrypt-4.4.38" [];
"python3-3.12.10" -> "openssl-3.4.1" [];
}
The build produces a handful of warnings if run without previously
running `flox activate` due to this newly filed bug:
- flox/flox#3203
zmitchell
reviewed
Jun 6, 2025
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zmitchell
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Heroic effort to figure this bullshit out
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This took a while to figure out because "building" a Python application
normally means distributing for it installation with a tool like
pipbut it doesn't necessarily produce a standalone artifact that can be run
as a "binary" command, in the same way that
bundlercan producebinstubs for Ruby applications.
Poetry is instructed to install into a new virtualenv within
$out:I can't control the nesting though so we have to symlink the binary:
That binstub references the virtualenv:
The resulting build can be run without being in an existing activation:
The resulting closure looks like this:
The build produces a handful of warnings if run without previously
running
flox activatedue to this newly filed bug:Also filed a bug for detecting newer Poetry projects: